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ThoughtCo.com is the World's Largest Education Resource
From chemistry to computer programming, arts to World War II, ThoughtCo.com provides guides, tips, and resources to help you understand more about the world around us.
https://www.thoughtco.com/
1 high issue
3.0%
2 medium issues
6.1%
4 low issues
12.1%
26 tests passed
78.8%
0.15 seconds
26.92 kB
13 resources
Secure
Seo
Title
The title tag is perfect.
ThoughtCo.com is the World's Largest Education Resource
Meta description
The meta description tag is good.
From chemistry to computer programming, arts to World War II, ThoughtCo.com provides guides, tips, and resources to help you understand more about the world around us.
Headings
There is no h1 tag on the webpage.
  1. Science, Tech, Math
  2. Humanities
  3. Languages
  4. Resources
  5. BEHIND THE NEWS
Content keywords
The content has relevant keywords.
thoughtcoisthe
Image keywords
All images have alt attributes set.
SEO friendly URL
The URL is SEO friendly.
https://www.thoughtco.com/
404 page
The website has 404 error pages.
https://www.thoughtco.com/404-7333576f79222887346b594954bce3bb
Robots.txt
The webpage can be accessed by search engines.
Noindex
The webpage does not have a noindex tag set.
In-page links
The number of links on the webpage is okay.
  1. Home
  2. Science, Tech, Math
  3. Science
  4. Math
  5. Social Sciences
  6. Computer Science
  7. Animals & Nature
  8. Humanities
  9. History & Culture
  10. Visual Arts
  11. Literature
  12. English
  13. Geography
  14. Philosophy
  15. Issues
  16. Languages
  17. English as a Second Language
  18. Spanish
  19. French
  20. German
  21. Italian
  22. Japanese
  23. Mandarin
  24. Russian
  25. Resources
  26. For Students & Parents
  27. For Educators
  28. For Adult Learners
  29. About Us
  30. Science
  31. Math
  32. Social Sciences
  33. Computer Science
  34. Animals & Nature
  35. History & Culture
  36. Visual Arts
  37. Literature
  38. English
  39. Geography
  40. Philosophy
  41. Issues
  42. English as a Second Language
  43. Spanish
  44. French
  45. German
  46. Italian
  47. Japanese
  48. Mandarin
  49. Russian
  50. For Students & Parents
  51. For Educators
  52. For Adult Learners
  53. About Us
  54. Contact Us
  55. Editorial Guidelines
  56. Privacy Policy
  57. Science, Tech, Math
  58. Humanities
  59. Languages
  60. Resources
  61. Science, Tech, Math
  62. The Visible Light Spectrum
  63. What Is Mindfulness in Psychology?
  64. Why Learn Geometry? Definition and Uses
  65. Science, Tech & Math
  66. All Science, Tech, Math
  67. Humanities
  68. Today in History: Death of Elizabeth Cady Stanton
  69. 50 Great Topics for a Process Analysis Essay
  70. Examples of Cast-Iron Architecture in Photos
  71. Humanities
  72. All Humanities
  73. Languages
  74. 9 Myths About Learning Italian
  75. English-German Glossary of Weather Words
  76. Japanese Sports Vocabulary
  77. Languages
  78. All Languages
  79. Resources
  80. What an Undecided Major Means
  81. Teaching Patterns to Children
  82. Vocabulary Learning Tips
  83. Resources
  84. All Resources
  85. 11 Facts You Should Know about Halloween
  86. How to Preserve a Halloween Jack-o'-Lantern
  87. Halloween Quotes for Kids
  88. Home
  89. Science, Tech, Math
  90. Humanities
  91. Languages
  92. Resources
  93. About Us
  94. Privacy Policy
  95. Cookie Policy
  96. Editorial Guidelines
  97. Contact
  98. Terms of Use
  99. California Privacy Notice
Language
The webpage has the language declared.
en
Favicon
The webpage has a favicon.
https://www.thoughtco.com/apple-touch-icon-180x180.png
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.15 seconds.
Page size
The size of the HTML webpage is 26,916.00.
HTTP requests
There are fewer than 13 HTTP requests on the webpage.
  1. https://www.thoughtco.com/static/3.118.0/cache/eNp9kt1uwyAMhV9oiHfoNO1qUlXlBfhxUjeAMzCpkqcfaastTVkkbvD5sI-xZWLFaKRXgR1IQ36gAIGTdGqizPKSyhHmDKZ_k8_wZYHmKeEMhaDQYrdFHjeHOj3htVSkLNiKMEKwFKUnCzHgHMVdqpCGqMfX5BsT3xnilDhi6Co5MqNDxqrFNog92ZLf1T-Pzf_t8TkS19uKUJgMTVSmX5suki-M0BFUPxCWqa21CC1ECAZ2TQ1Zp6wrwqk5VKK8mDix_hhhXe4P8GrStSbev47b6GrZlL2NJgcs0xHJEYtlT35fvKLdwLVuVAdiRLju1OrY35bFoekFPz71B0DJJIU.min.js
  2. https://www.thoughtco.com/static/3.118.0/cache/eNp9Um1SxSAMvJAMh3gz_vKXniBA2samQSF9X6c3bR191rYzDCTL7hIIviooRT-AKKP_zphC9e82Pkcstyf_l2QboxKTElYXRmJ1F9LO7bIHC9wZhJjB1Vgy85oV8_CRBUWrJ1EsAuwTNlgm_RwUTBvWp7fX552DHyx7ULwu8wELmsZuZSTHJL0reCmkSwU7WwdmeF1uQfdFM7_nP_DA4EKpRVs7pLbTUwfS4gtVRbGStsC116qX1ZL-FkiPDoVUfbA2hQwlLbLoOMfe_aI_8gddyzlYxzqENFc3LVu8JpfB2FO5wK4ilNit0i2ZwJlaA7P4ZmS2L4QoztBV-gWLnRNu.min.js
  1. https://www.thoughtco.com/static/3.118.0/cache/eNqdUttygyAQ_aEyfkRf-xMIqzAB1mExbf--i2SiRhJMH5Szl7P3jpJMVnVehuSgU0Rd1sBHdzRYL0cQk5MKDDoN8e6UrV7asFMY9DAx4xAK_YQBQqLuwpl-yn-lPpojDBAhKBB7x2M4qWnJfLUasBYwO_D3IsS31SPwa8COJn0aGUb4spQgQKwqa2mCvNqRlRhuM2PFimoMApXdubrIFgdCoZv9Ua5xHVdCXe9QXUTGG1hzX6y3p_wbLdCEyeXGV_Q-Q3zbZESyPO7GAnvrXI8y3nZJ7Hn5Fav2PXqF16y57OKh2POdlgH_g_hsY6PDXjq-PqmXI5S6fnYDRs_e-SqlEwQyKvMgNqoqsZdzXWGDM8zOkYoAYeHtxQa3j5xFxdn3tMUNlsKQpEpLug1-MboBMfHoyvPigLYLQmV5bEuOfIZ3sbXYlXeaU-oq47vDcxxnw4V2wrn2NCYtyYg52CtE2nRatbRn-5T6B7jOdvI.min.css
  1. https://www.thoughtco.com/static/3.118.0/images/hp-science,tech,math.png
  2. https://www.thoughtco.com/static/3.118.0/images/hp-humanities.png
  3. https://www.thoughtco.com/static/3.118.0/images/hp-languages.png
  4. https://www.thoughtco.com/static/3.118.0/images/hp-resources.png
  5. https://www.thoughtco.com/thmb/PkoCtBz73kKzNqp61PPyEfFRLrA=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/the-visible-light-spectrum-2699036_FINAL2-c0b0ee6f82764efdb62a1af9b9525050.png
  6. https://www.thoughtco.com/thmb/5r3wb6Rt2rvgwMDO3Uy2mTZBpi4=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/Stanton-108882522-56aa24445f9b58b7d000fb0d.jpg
  7. https://www.thoughtco.com/thmb/AIM46VA0HrgrUZRfq-e3i9vk7ds=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-667610721-afa4e541c4dc4c32bdfa16d277b9b2bd.jpg
  8. https://www.thoughtco.com/thmb/re4kHYcO_23qnhCtPk_-_3OArms=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/university-student-sitting-at-desk-with-hand-on-chin-530682859-59bafc68845b340011d16570.jpg
  1. https://www.googletagmanager.com/ns.html?id=GTM-5P3SZGS
  2. https://www.thoughtco.com/about:blank
Image format
There are 8 images that are not using the AVIF, WebP format.
  1. https://www.thoughtco.com/static/3.118.0/images/hp-science,tech,math.png
  2. https://www.thoughtco.com/static/3.118.0/images/hp-humanities.png
  3. https://www.thoughtco.com/static/3.118.0/images/hp-languages.png
  4. https://www.thoughtco.com/static/3.118.0/images/hp-resources.png
  5. https://www.thoughtco.com/thmb/PkoCtBz73kKzNqp61PPyEfFRLrA=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/the-visible-light-spectrum-2699036_FINAL2-c0b0ee6f82764efdb62a1af9b9525050.png
  6. https://www.thoughtco.com/thmb/5r3wb6Rt2rvgwMDO3Uy2mTZBpi4=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/Stanton-108882522-56aa24445f9b58b7d000fb0d.jpg
  7. https://www.thoughtco.com/thmb/AIM46VA0HrgrUZRfq-e3i9vk7ds=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-667610721-afa4e541c4dc4c32bdfa16d277b9b2bd.jpg
  8. https://www.thoughtco.com/thmb/re4kHYcO_23qnhCtPk_-_3OArms=/261x174/filters:no_upscale():max_bytes(150000):strip_icc()/university-student-sitting-at-desk-with-hand-on-chin-530682859-59bafc68845b340011d16570.jpg
JavaScript defer
The are 1 javascript resources without the defer attribute.
  1. https://www.thoughtco.com/static/3.118.0/cache/eNp9kt1uwyAMhV9oiHfoNO1qUlXlBfhxUjeAMzCpkqcfaastTVkkbvD5sI-xZWLFaKRXgR1IQ36gAIGTdGqizPKSyhHmDKZ_k8_wZYHmKeEMhaDQYrdFHjeHOj3htVSkLNiKMEKwFKUnCzHgHMVdqpCGqMfX5BsT3xnilDhi6Co5MqNDxqrFNog92ZLf1T-Pzf_t8TkS19uKUJgMTVSmX5suki-M0BFUPxCWqa21CC1ECAZ2TQ1Zp6wrwqk5VKK8mDix_hhhXe4P8GrStSbev47b6GrZlL2NJgcs0xHJEYtlT35fvKLdwLVuVAdiRLju1OrY35bFoekFPz71B0DJJIU.min.js
DOM size
The DOM size is optimal.
The HTML file has 559 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://www.thoughtco.com/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage does not have a public server signature.
Unsafe cross-origin links
The webpage has 3 unsafe cross-origin links.
Plaintext email
The webpage does not contain any plaintext emails.
Miscellaneous
Structured data
The webpage has structured data.
        Meta viewport
        The webpage has a meta viewport tag set.
        width=device-width, initial-scale=1.0
        Character set
        The webpage has a charset value set.
        utf-8
        Sitemap
        The website has sitemaps.
        1. https://www.thoughtco.com/sitemap.xml
        Social
        The webpage has 1 social links.
        Content length
        The are less than 500 words on the webpage.
        The webpage has 357 words.
        Text to HTML ratio
        The text to HTML ratio is under 10%
        The text to HTML ratio is 2%.
        Inline CSS
        The webpage contains inline CSS code.
        1. display:none;visibility:hidden
        2. padding-bottom:66.6%;
        3. padding-bottom:66.6%;
        4. padding-bottom:66.6%;
        5. padding-bottom:66.6%;
        6. background-image:url('https://www.thoughtco.com/thmb/arIMGoEpDcKbW3v8wFjiQNEdEGc=/300x300/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-458186534-58b885265f9b58af5c2a07e6.jpg')
        7. height: 650px;
        Deprecated HTML
        There are no deprecated HTML tags on the webpage.